title: Personality factors in methadone self-administration by heroin addicts.
mesh_terms: D000293:Adolescent; D000328:Adult; D001521:Behavior Therapy; D003376:Counseling; D006556:Heroin Dependence / Q000523:psychology*; D006801:Humans; D008691:Methadone / Q000008:administration & dosage*; D008875:Middle Aged; D010551:Personality; D010556:Personality Tests; D011613:Psychotherapy; D012646:Self Administration
chemical_list: D008691:Methadone